The application of a general model for nitrification denitrification biological excess phosphorus removal (NDBEPR) activated-sludge systems is demonstrated. Results of simulations show the model is capable of predicting sludge production and oxygen use for a range of system types and
configurations, and of tracking changes in a number of parameters including soluble phosphorus and nitrate concentrations. Application of the model is demonstrated for aerobic and anoxic–aerobic systems and for a number of nutrient removal systems for both steady-state and for dynamic
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